Press for making brick.



No. 694,009. Patentd Feb. 25; I902. J. E. anmman.

i (No Model.)

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J. E. GRINDER.

1 PRESS FOR MAKING BRICK.

(Application filed m 21 1901.

v I (tau lava Gil Farr, 7' 0 aft away I Patented Feb. 25, I902.

* No; 694,009. A

' J. E. GRINDER.

PRESS Fun MAKING BRICK.

(Application filed May in. 1901.

3 Sheets-Sheet 3.

(No Model.)

' attoz'mud UNITED STATES PATENT I JOSEPH EDWARD GRINDER, OF WASHINGTON, DISTRICT OF COLUMBIA.

PRESS FoR MAKING BRICK.

SPECIFICATION forming part of Letters Patent No. 694,009, dated February 25, 1902.

Application filed May 21, 1901.

T at whom it may concer /1,:

Be it known that I, JosEPH EDWARD GRIN- DER, a citizen of the United States, residing at the city of Washington, District of Colum- 1 sity and weight is in most cases impracticable.

In carrying my invention into effect I aim to supply the mold or form with precisely the same amount of material at each operation and to subject each such quantity to exactly the same pressure between opposing plnngers, so that the result will be bricks of uniform size and density.

In the accompanying drawings, Figure 1 is a side elevation of a brick-pressing machine made in accordance with my invention. Fig. 2 is a longitudinal sectional elevation of the same. Fig. 3 is a sectional plan view of a portion of the machine on the line 3 3, Fig. 2. Fig. 4 is an end elevation of a slightly-modified construction of the device. Fig. 5 is a side elevation of the same, and Fig. 6 illustrates details of construction more specific-all y referred to hereinafter.

Referring to the drawings, 1 represents a suitable base, from which rise standards 2, forming a framework for-the support of the various operating portions of the apparatus. Secured rigidly to the frame isa table 3', provided with longitudinal guiding-grooves 4, into which fit ribs 5 on the sides of a moldbox 6, the latter being moved to and fro on the table and being held in position by the guiding-grooves during the various steps in the operation of the machine.

The brick-mold 7 may be formed directly in the slide or box 6 and be of the usual con-;

tour of a brick; but as the apparatus may be made to form a brick of any shape I preferably use a separate mold 7 as shown in Fig.

6, for each form and size of brick and place such mold in proper position in the mold box or slide, the various molds all being of the same shape and size so far as exterior dimensions are concerned and being readily'interchanged.

To lugs 8 on the rear of the slide 6 is pivoted a link 9, connected at its opposite end by a pivot-pin 10 to a lever 11, fulcrumed on a pin 12 in the frame, the outer end of said lever being connected to any suitable operating mechanism or, it necessary, operated by hand.

In suitable guides in the framework are oppositelyopposed vertically reciprocating plungers 13 14,'the upper plunger 13 being connected by a link 15 to one end of a lever 16, fulcru med at 17 to the frame, the opposite end of said lever being connected by a link 18 to the pivot-pin 10, the result of the-conuections being that on the depression of the outer end of the lever 11 the slide 6 will be forced outwardly on the table and the plunger 13 will be forced in a downward direction.

The lower plunger 14 passes through an opening 19 in the table, and normally its upper surface is in alinement with and forms part of the surface of said table. .The lower portion of this plunger is held in a box 20, adapted to guides 21 on the fixed frame, and said box is pivotally connected to one end of a lever 22, fulcrumed at 23 to the frame, the opposite end of said lever being connected by a link 24 to the main operating-lever 11.

At a point above and near the pin 23 is a pin25, secured inthe frame and forming the fulcrum of a supplemental lever 26, one end of which supports and engages the plunger 14,

and its opposite end being curved, as shown, and adapted to be oper'atedby the projecting endof the link 18 when duringthe operation of the levers such movement maybe requisite.

The link 9 is provided with a cam-face 27 on its upper side, against which mayacta roller 28, carried by the link 18, and on the lower side of said link 9 is asecond cam-face 29,which rests against and travels on a curved surface 30, formed on the frame 2, during the reciprocating movement of the slide '6 This link 9 is further connected by a tensionspring 31 to the base 1, the spring acting to The operation of the mechanism thus far described is as follows: The parts being in the position shown in Fig. 2, clay falls from the hopper and fills the mold 7. The outer end of lever 11 is then depressed, causing the slide to move from the position shown in Fig. 2 to a point directly in line with the plungers 13 14. At the same time the elevation of pin and link 18 acts through lever 16 and link to depress the plunger 13, and the lever 23 is also operated to raise box 20 untilit comes into contact with auxiliary lever 26, which is also raised, and with it the leverplunger 14, the two plungers acting in opposite directions on the clay within the mold and exerting considerable pressure thereon. It will be observed that owing to the difference in lengths of the levers 16 and 23 and their respective fulcrum-points plunger 13 will be forced within the mold to a much greater extent than the plunger let, the movement of the latter being Very small, owing not only to the positions and lengths of the levers,

4 but also to the lost motion which must ensue before the plunger 1% is positively forced upwardly. The brick having been formed, the direction of movement of lever 11 is reversed, causing the plungers to recede, the brick resting on the upper face of the plunger 14 and being lowered with the latter within the opening 19 in the table until it is entirely clear of the mold. The latter is then free to reassu me the position shown in Fig. 2, its retraction being effected by the spring 31, which, drawing down link 9, causes the cam 29 to travel on the rounded surface 30, and,further, the roller 28 on link 18 engages the cam-face 27 and assists the movement. The slide is fully back at just the time the projecting end of the link 18 engages the curved end of the lever 26 and depressing such curved end causes its opposite end to elevate the plunger 14: to the position shown in Fig. 2, the brick carried thereby being thus held on a level with the surface of the table in immediate line with the slide, so that when said slide again travels the brick will be forced out on the ta-' ble and leave the surface of the plunger free for the next operation.

The apparatus so far described is designed more especially to be driven by power. In the modified form shown in Figs. 4 and 5the apparatus may be worked by hand, the plunger-operating mechanisms being of precisely the same character as described with reference to Figs. 1 and 2. In moving the slide 6, however, a slight change is made, said slide being provided with an extension 34, having a groove 35, in which are two set-screws or adjustable studs 36, between which is placed an arm 37, the position of said arm being adjusted by the studs as desired. The arm 37 is secured to a rock-shaft 38, carried by the frame, one end of said shaft being provided with a hand operating-lever 39, which being operated reciprocates the mold between the hopper and the compression-plungers.

It will be observed that the various lovers are provided with auxiliary holes for changing their fulcrum-points and. points of connection with the several links, so that the parts may be adjusted to give greater or less pressure to a given quantity of clay or to manufacture bricks of varying thickness, while the separate mold-box 7 permits the manufacture of various sizes and shapes of brick with the same apparatus, the plungers of course being correspondingly altered.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. The combination, in a brick-press, of the mold, a table carrying the same, plungers 13, 14 adapted to enter said mold to compress the material therein, an operating-lever 11 fulcrumed on the frame of the machine, auxiliary levers 1G and 22 also fulcrumed on the frame, links connecting said plungers to said auxiliary levers and links connectihg the lever 11 to the auxiliary levers and to the mold, substantially as specified.

2. The combination, in a brick-press, of the mold, a table carrying the same, oppositelydisposed plungers adapted to enter said mold and compress the material therein, an operating-lever l1 fulcrumed to the frame, a link 9 connecting said lever to the mold, a system of levers and links connecting thelever 11 to the upper plunger 13, a guide-box 20in which the lower plunger is carried, a lever and link connecting the same to the lever 11, and an.

auxiliary lever 26 fulcru med to the frame and adapted to act on the plunger 14:, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH EDWARD GRINDER. Witnesses:

UPTON B. EDMONSTON, HARRY S. WELCH. 

